Apparatus for machining ends of metal blanks.



E. EINFBLDT. APPARATUS FOB. MACHINING vENDS 0F METAL BLANKS.

`APPLIOATIOK FILED JUNE 2B, 1909.

993,158. Patented May 23,1911.

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E. BINFELDT. APPARATUS P011 MAGHINING ENDS or' METAL BLANKS.

APPLICATION FILED JUNE 26, 1909.

993, 158. Patented May 23,1911.

4 SHEETS-SHEET 2.

E. EINFBLDT. APPARATUS FOR MACHINING ENDS OP METAL BLANKS.

APPLICATION FILED JUNE 26, 1909.

Patented May 23, 1911.

4 SHEETS-SHEET 3.

.. l A s n wwwa/Joe E. EINPELDT. APPARATUS FOB MACHINING ENDS 0F METAL BLANKS.

APPLICATION FILED JUNE 26, 1909.

993,158. Patented May 23,1911.-

4 SHEETS-SHEET 4.

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AMM? MW UNITED STATES TTENT OFFICE.

' EMIL EINFELDT, OF DAVENPORT, IOWA, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 Gr. WATSON FRENCH, NATHANIEL FRENCH, AND JOSEPH L. HECHT, OF DAVENPORT,

IOWA, A FIRM.

APPARATUS FOR MACHINING ENDS OF METAL BLANKS.

. To all whom fit 'may concern:

lrear elevation of the same.

Be it known that I, Emi. EiNriiiin'r, of Davenport, county ot' Scott, andState of Iowa, have invented a new and useful I inprovement in .Apparatus for Machining Ends of Metal Blanks, of which the following is a specification. i

This invention relatesl to grinding .or trimming machines, and is designed partie ularly for shaping the ends of rolls or bars to be used in roller bearings.

The machine embodying the invention is automatic in its action, the metal blanks being fed automatically from a magazine or holder to Shaping tools, and after being shaped are delivered therefrom automatically in finished condition.

In its essential features, the machine ernbodies a magazine or holder in which the blanks to be operated on are stored, clamping jaws by which the blanks are taken one at a time from the magazine, and presented in position to be acted on, and shaping tools adapted to act on the ends of the blanks held between the jaws.

In the accompanying drawings, forming a part of this specification, and in which like reference-characters indicate corresponding parts, and wherein I have illustrated one of many embodiments of my invention: Figure 1 is a view in front elevation of the machine. Fig. 2 is a view in Fig. 3 is a view in end elevation thereof. Fig. 4: is a vertical transversesectional elevation, taken on a line centrally of Fig. 2. Figs. 5 and (3 are enlarged plan views of the jaw-members, and illustrating, respectively, these members with and without a roller-blank engaged thereby. In these drawings: l designates the bed or supporting portion of the machine, sustained by standards or legs, in which bearings are formed for shafts 5, G, one end of the latter extending beyond thc end of the machine and into a bearing carried by a side-bracket 7, contiguous to Specification of Letters Patent.

Application filed June 26, 1909.

Patented May 23, 1'911.

Serial No. 504,452.

upon which is formed a fixed horizontal guide 12, provided with a central dovetailed portion 13. Slidably supported on and engaging said dove-tailed portion are two horizontally movable jawanembers 14 and 15, which I shall hereinafter refer to as the front 'law-member 14 and the rear jawmembcrlo, the former being movable relatively to the other horizontally, and, also, in unison, for purposes presently to be explained. These jaws are each in the form of a flat plate, the` abutting edges 14 and.

15 of which are preferably coneaved in order to engage thc roller-blanks A.

The front. jaw-member is held frictionally on its guide by means of a vertical spiral Ispring 1G encircling a bolt 17 fixed to the guide and extending upwardly through a 'fore-and-aft slot '18 in the jaw-plate, the upper end ol said spring bearing against a head 1S) on the bolt, and the lower end bcar` ing against the upper face of the liaw-plate. The forward motion of the plate 14 on its guide is limited by two longitudinally-extending set-screws Q0, 20, passing thro-ugh vertical shoulders 21, 2l, at the sides of the guide 12 at its front, and inposition to be encountered by the front edge 14 of the lfront jaw-plate when the latter arrives at the limit of its forward motion, as presently to be described. '.lhe rear jaw-plate is also horizontally movable on the guide 12, and has a depending arm 22 extending through a slot: in said guide and connected with a rod 28 extending forward and loosely through an arm 24 depending from the front jaw-member 14. On the end ot the lrod 28. beyond the Yarm 24, is a. head which is adapted to engage the lower' end of the depending arm 24 when the rod slides rearwardly through the same and which will thereby acl, to retract the front jawincinber 14. Frein this construction it. will be seen that when the rear jaw is moved.

to clamp the blank firmly. It will be understood thatthe operations just described are 'forthe purpose, first, of positioning the jaws (separated from each other) to receive the roller-blank; secondly, of clamping the same between ythese two members, .and` finally, of positioning ,the clamped blank for the machining or shaping operation.

After the shaping operation is completed,

rearward movement of the rear jaw-member for the neXt machining operation brings the head 25 into engagement with said arm .2'4 and thereby shifts the front jaw-member rearward with the rear jaw-member until the ,jaws are again positioned to receive the second roller-blank.

The mechanism for effecting' the positioning-movement of the. jaw-members comprlses a vertical lever 26 pivoted between its ends, between the forks of a bifurcated bracket 27 (Fig. 5) extending rearwardly from the machine-frame. Said lever has jointed at each side of its upper end, two horizontal links 28 which are also pivoted at each vside of the upper end 22l of the arm 22 carried by the rear jaw-,member 15. The lower end of the lever 26 is jointed to the rear end of a horizontal arm 29, the forward end of which i/'s forked to embrace a shaft 30, by which the arm 29 is guided yin its movements'baek and forth. which movements are effected by means of a. cam-wheel 31 keyed on the shaft. 30, and formed with a cam-groove 32 in -which engages a 'roller 33 carrledby the arm 29 at its side. The

shaft 30 is mounted in bearings in the frame of the machine, and receives its rotary'movement by gear teethx on thecam-wheel 3l meshing with a pinion' 34 carried by a stubshaft 35 supported in :nil/)racket 36 depending from the machine-bed, which stub-shaft carries a gear 37 meshingwith a pinion 38 carried by a stub-shaft 39. On the outer end of the stub-shaft 39 is mounted a-gear 40 which, in turn, meshes with apinion 41 carried b v-the shaft-5, before referred to', and a'pginion 9 meshing with a pinion 1 0 on the shaft 6, the latter being driven,b v` the pulley 8. v

It willnow be understood that the lever 26 receives an oscillatory motion by reason of the travel ofthe roller on' the arm 29 .'inthe cam-groove 32 during the rotation of the cam-wheel 31; that this oscillatory motion of said lever effects a retraction or prf je'ction (as the case may be) of the rear jaw-member 15 by reason of its connection with said lever through the link 28 and the arm 22,' and that the front ja'w-memberl4 70 has imparted to it v(in the manner already described) a relative horizontal movement.

Mounted in bearings invertical standards 42, 42, rising from the machine-bed, are two alined horizontal spindles vo rshafts 43, 44, provided at their inner en ds with shaping or cutting tools and attheirvouter ends carrying driving pulleys 432L and 44a, splined to the shafts, and driven by bands 43b and 44", passing` over pulleysv 5a and 6a mounted 80 on the shafts 5 and 6, respectively, by which means the spindles receive rotary mot/ion respectively in opposite directions. i

At its outer end, each spindle is encircled by two collars 45, 445, each containing a.85 hall-race, and, between said collars the shaft is loosely encircled by a central sleevey org. disk 46 with straight. plane side-faces,-tw0t series of balls 47, 48, being interposed between the opposite sides'of the sleeve andl i0 the raceways. The sleeve 46 is jointed to if; the upper end 'of a forked lever 49 pivoted between ils ends to abra'cket 50 projecting 5 from the side of the standard 42, and which lever carries on its lower end a roller 50a 95 engaged by a cam-wheel 30L on the outer end of the cam-wheel shaft 30 before referred to, by which means the two spindles are moved to and from each other to cansey the shaping tools to operate on the ends of the blanks and release the same respectively. "he lever 49 is, as shown, formed in two f parts jointed together` the upper part or member being pivoted on the bracket'O, `and the lower part be-ing jointed to the upper member below .its fulcrum on the bracket, adjusting screws `being provided` for changing its operating position with relation to the upper member. The form of lthe cam 30 and its relation 4to tlie' 'aw- 110 operating cam 3l (carried by the shaft 30) is` such that ythe forked levers 49 will be operated' to move the spindles inward-to ward and against the roller-blank after the latter have been moved-by the jaw-members to the .position to be operated upon. The roller 50 is maintained indpositive engagement -with its cam by the spring 50b connected with the lever 49 and the machine-frame.

As the upper end of the forkflever 49 120 moves transversely back and forth on its pivot, thesleeve 46 carried thereby will move slightlyl between the two series of balls yand transversely of the spindles, which movement is provided for by forming the bore |of said sleeve of a diameter consider' ably. greater than that of the spindles.

Supported above the machinebed,l and,

at its rear, on the bracket 53 carried by'the rear end of the` guide 12, is a holder orl39 magazine 54:I preferably formed with an inclined bottom 54 (Fig. 4t), the forward end of which is bent downward to present a channel between it and the front wall of the magazine for delivering a. single blank at a time to the jaw-members. In order that the blanks in the magazine may be prevented .from becomingr wedged or clogged therein and, thus prevented from readily entering between the jaw-members, I provide the magazine with a swinging frame or agitating-.mem'ber 55 pivoted at its upper end between lugs 56 projecting from the front 4ot' the magazine, and having at its lower end an in 'ardly extending lip 57 projecting into the magazine, as shown in Fig. 4. This swinging member carries a 'forwardly extending projection 58 adapted to be engaged by an upstanding lug 14 on the rear end of thefront jaw-member, with the re- L'ult that when the jawmember moves back- 'ard to receive a roller-blank, the lug will engage the projection 58 and force the lip 5T inwardly against the pile of blanks in the box and agitate them.

From the foregoing. the complete opera-- tion of the machine will be clear: The motion imparted to the drive-shaft 6 will, through the gearing already described, rotate the shaft 5 and operate the pulleys 5 and t3 to rotate the spindles and the cam wheel 3l to eti'ect a positioning ot' the jawmcmberswtirst, to receive the blank from the overlying magazine. then to close them u-pon the blank, and finally to carry them and said blank into a position where the latter will be in alinement with the shaping tools. rThereupon, the cams 2,0 on the ends of the cam-shaftl 30, operate the levers 4t) and move the spindles longitudinally in their' bearings and, thus, position the respective shaping tools in operative relation to the ends of the blank. The spindles also having a rotative movement, the tools perform their functions, after which the tools are withdrawn from cutting relation with ,the blank-ends by means ot the cams 80. the

jaw members lwith the linished roller then moving forward and separating to drop the, same into an inclined chute 5S). leading to a trough 59 at the front ot' the nnlchine-bcd.

Ilaving thus described my invention, its construction and mode ot` operation, what I claim and desire to secure by Letters latcnt ot' the United States is as follows:

l. In a machine ot the type described, the combination of two ja ws movable relatively and in unison aml adapted to grasp the article to be acted on between them; means for moving one ot' the jaws toward the other jaw. whereby said jaws and thc article lietwcen them will be moved in unison to pre 'sent the article to the action ot' thc shaping devices, and means t'or arresting the movement ot the said other jaw, whereby the continued movement of the tirst`jaw relative to the other jaw wiil bind the art'igclctixedly between them. V l 2. In a machine ot' the type described, the combination of a front jaw'and a rear jaw movable relatively to each other and in unison, and adapted to grasp the article to be acted on between them, means t'or moving the rear jaw toward the front jaw, whereby said jaws and the article between them will be moved in unison to present the article to the action otl the shaping devices, and means for arresting the motion ot' the t'ront jaw, whereby the continued movement of the rear jaw will bind the article fixedly between them. l

3. In a machine of the type described, the combination ot two sliding jaws movable relatively and in unison and adapted to grasp the artick` to he acted on between them, means for advancing the jaws in unison from the receiving position to present the article to the action ot shaping devices and for retracting one of the jaws relatively to the other to release the clamped article, and connections between said jaws adapted on the continued retraction of said jaw to move the other jaw back with it to a receiving position.

4;. In a machine of the type described, the combination ot' a front. jaw and a rear jaw movable relatively to each othe 'and adapted to grasp the article to be acted on between them, said jaws heilig adapted to be advanced in unison to present the article to the action otl shaping devices, means for retracting the rear jaw relatively to the front jaw` to release the article, and a connection between said jaws adapted on the continued retraction ot' the rear jawvto draw the front jaw back with it.

5. In a machine of the type described, the combination ot? a front jaw and a rear jaw movable relatively and in unison and adapted to grasp the article to be acted on between them, means for moving the rear jaw toward the front jaw to cause the jaws and the grasped article to be, advanced from the receiving position to present the grasped article to the action of the shaping devices, means t'or arresting the motion of the 'front jaw, whereby the continued movementJ of thc rear jaw will bind the article tiftedly between them, means t'or retracting the rear jaw relatively to the front jaw to release the article, and a connectit'in between said jaws adapted, as thc retraction of the rearjaw continues, to move the front: jaw back with it. ,1'

t. In a machine of the type described, the combination of a front jaw and a rear jaw movable relatively ami in unison and adapted to grasp the article to be acted on between them, means for advancing and 1'etracting the rear jaw, a rod connected with ing provided in its bottom the rear jaw and extending to the front aw, and a stop on said rod adapted to encounter the front jaw as the rear jaw is retractedA and carry the front jaw rearwardly.

7. In a machine of the type described, the combina-tion of a magazine to holdthe articles to be acted on, an agitator device movable in said magazine, two jaws movablecombination of a magazine, an agitator d'e-l vice operating therein, a front jaw, a rear jaw, a connection between the two jaws, meansfor operating the jaws relatively to the magazine, and means carried-by one of the j aws'for operating the agitator device.

9. In a machine of the type described, the combination ofa magazine adapted to hold the articles to be acted on, said magazine bewith an opening for the discharge of the articles and being provided in its front with a second opening, an agitator frame mounted on the magazine and operating through the front opening in Vtol grasp the articles to the magazine, coperating front and rear jaws movable forwardly and backwardly with reference to the magazine and acting be acted on and advance the same, and a lip on the front jaw in position to encounter-theagitator frame when :the said front jaw is retracted.

10. In a machine of the class specified, a

tained by said support, an agitator-device working 1n said magazlne, a front' Jaw memsupport,I a guide thereon, a magazine sils-A s,

ber slidable on said guide, a rear jaw member also slidable upon said guide, a connection between the two jaw-members, means for operating said jaw-members relat-ive to said magazine, cutting tdols shift-able with relation to said jaw-members, and means for operating said clitting tools, and means carried by one of said jaw-members for operating said magazine 4agitatingldevice.

In testimony whereof I hereunto set my hand this 10th day of Jne, 1909, in the presence of two attesting witnesses.

EMIL EINFELDT. Witnesses:

ANDREW N EiLsoN, LEON ZOECKLER. 

